The Unitary Patent and Freedom to Operate: a new risk landscape for smaller EU states

What changed and where is the greatest risk?

The net effect is uneven across Europe. In the largest markets the relative change in “patent density” is smaller because many European patents were already validated there as a matter of course. Under the pre-UP system, proprietors often validated in only a handful of countries, most frequently Germany, France, Italy and the Netherlands among current UP members. By replacing selective national validations with a single unitary title the UP shifts a large share of new grants into all participating states at once and removes cost and administrative frictions that previously led applicants to limit the breadth of validation.

Uptake has been strong. At the one-year mark the European Patent Office reported more than 27,500 Unitary Patents registered, representing about one quarter of all EP grants in that period. By February 2025 the Commission recorded more than 48,000 Unitary Patents in total and more than 700 cases filed before the Unified Patent Court (UPC). These figures clearly show that a very large cohort of patents is now effective concurrently in all participating states.

Coverage has also broadened with new ratifications. Romania was the latest country to join, effective 1 September 2024, bringing Unitary Patent coverage to 18 states. Unitary Patents registered on or after that date take effect in eighteen member states, which defines the territorial footprint for that generation of titles. The legal position that territory is fixed at registration matters for freedom to operate (FTO) because a single date can mark a step change in the number of rights that are enforceable in a given country.

What the data already shows in smaller states

Finland offers clear evidence of how quickly local patent density can change. The Finnish Patent and Registration Office (PRH) reports that the number of patents in force doubled in just under two years, surpassing 100,000 on 27 February 2025. PRH attributes the upsurge to the Unitary Patent, noting that Finland had hovered around 50,000 patents in force before the system launched in June 2023. PRH also cautions that this higher background density increases the risk of inadvertent infringement even for firms that operate only in the Finnish market.

Estonia seems to point in the same direction. By the first half of 2024 there were some 10,000 European patents recorded as in force in the Estonian registers, alongside roughly 100 national patents. The Estonian Patent Office links these figures with increased European patent enforcement activity. For a market that historically saw modest numbers of annual validations this level shows how rapidly patent coverage can thicken once unitary effect begins to flow.

The lesson for other smaller or mid-sized participating states seems straightforward. Where there had been a slow trickle of national validations there is now a stream of unitary titles that arrive automatically and take effect simultaneously. For FTO analysis that is a step change that materially alters the probability that a product or process will encounter a third party right somewhere in the supply chain. Finland’s figures are a practical benchmark for the scale of the shift and illustrate why local businesses that once faced a limited patent landscape must now navigate a much larger body of rights.

These dynamics may also become relevant in states that have signed but not yet ratified. Six EU members remain in that position, including Cyprus, Czech Republic, Greece, Hungary, Ireland and Slovakia. When any of these completes ratification, Unitary Patents registered after that date will immediately include the acceding state, and a rise in local patent density similar to that seen in Finland and Estonia should be expected.

Hungary merits mention because it illustrates the potential order of magnitude. Practitioners estimate that about 4,000 European patents are validated in Hungary each year under the classic system. If Hungary joins the Unitary Patent regime, newly registered Unitary Patents would take effect there automatically, and the number of patents in force could jump to on the order of 50,000-60,000. This is an estimate, but it captures the structural point that unitary effect removes the economic friction that previously kept many patents out of smaller markets.

Practical implications for freedom to operate assessments

Freedom to operate assessments in participating states now start from a higher baseline of patent risk, particularly in jurisdictions that historically attracted few European patent validations. The rapid accumulation of Unitary Patents on top of existing European and national rights has thickened the landscape and left less room to manoeuvre. Patent clearance should therefore be more deliberate and more data-led. Make this monitoring routine by technology area and by competitor, so that potential conflicts are identified while design choices can still be adjusted.

In addition, territorial rules must sit at the centre of planning. Unitary Patents registered on or after 1 September 2024 cover eighteen member states, and the territorial scope of any single title is fixed at the moment unitary effect is registered. Later ratifications do not expand earlier patents, but they do change the footprint for patents registered after accession. Because a single effective date can alter local exposure overnight, track ratification timetables in signatory states and adjust freedom to operate work streams ahead of time.

Enforcement exposure is also more immediate. The Unified Patent Court provides a central forum with pan-European reach, so products placed on smaller markets are more likely to be drawn into cross-border disputes than before. Pair clearance with early design-around analysis and timely licensing discussions, so commercial plans do not stall when a blocking right is found. Where the stakes justify it, consider a central opposition at the European Patent Office within nine months of grant or a revocation action before the Unified Patent Court, calibrated to the legal merits and commercial priorities. The practical goal remains the same: keep launches on schedule by combining rigorous monitoring with credible technical and legal fallbacks.

With thanks also to Akseli von Koch from Heinonen & Co, Attorneys-at-Law Ltd, part of Eversheds Sutherland